william dopp



UNITED STATES PATENT OFFICE.

H. WILLIAM DOPP, OF BUFFALO, NEW YORK, ASSIGNOR TO J. B. WHITE, OF -SAMEPLAGE.

LAMP.

Specification of Letters Patent No. 30,444, dated October 16, 1860.

To all 'whom it may concern.'

Be it known that I, H. W. DOPP, of Buffalo, in the county of Erie andState of New York, have invented certain new and useful Improvements inCoal-Oil Lamps; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings and to the letters of reference marked thereon.

In order that those skilled in the art may make and use my invention Iwill proceed to describe its construction and operation.

In the annexed drawings, of which Figure l is a vertical section, andFig. 2 a side elevation, A, represents the body of the lamp, in whichthe oil is placed. In the bottom of this body is an elastic diaphragm ora bellows, B, to which is attached a spring C, said spring standing in avertical position and being incased within a tube as shown in Fig. 1.

E, represents a pipe which is secured to the top of the body of thelamp, and which has connected to it a tube D, which extends down intothe lamp and conveys oil to pipe E. In the pipe E, is secured a stopcock F, which serves a double purpose-it admits oil to the burner, andat the same time its periphery being provided with a cam groove itserves to raise and lower the rod a, one end of which presses upon thestop cock and is governed by the cam groove.

Gr, represents a pipe which connects with the upper end of pipe E, bymeans of a screw. A rod a, passes through this pipe, and a wick c,surrounds the rod, as is represented in the Fig. l; To the upper end ofthe rod a, is secured a valve s, and on top of this valve is secured aneedle point Upon the lower end of the rod is a cap i and surroundingthe rod between the wick and the cap is seen a spring d.

n, represents a small nozzle with a minute hole through it. This hole isjust above the needle point and when the rod a, is raised the needlepoint passes into and through this small orifice for the purpose ofcleansing it of all impurities, and keeping it free from obstructions.H, represents a pipe which screws into the pipe G, and which isperforated as represented in the drawings.

The pipe H is provided with a cap It, and

is surrounded with three sleeves, M, N, I. It is also provided with anopening at e, through which the atmospheric air passes in and mingleswith the gas from the oil. The

gas burns as it escapes from the orifices at m.

The object in perforating the pipe H, is to prevent smoking and blowing.If a long burner pipe is used sutiicient heat cannot be obtained, and ifthe pipe is shortened it will blow or smoke unless perforated.

In using this lamp the oil is placed in the body A, through a properopening, to re ceive it. The lamp is then tightly closed, and thebellows or elastic diaphragm forces the oil up the tube D, into thepipes E and G. The oil is converted in gas as it passes through Athenozzle at n, and rising mingles with atmospheric air which enters theopen ing e, and passing out is burned at the ori ices m. A larger orsmaller flame may be produced by the use of the sleeves.

I wish not to be understood as claiming any particular form or shape ofapparatus as this may be changed without affecting my invention.

I claim- 1. The employment of a bellows or elastic diaphragm operated bya spring or equivalent for the purpose of driving or forcing the fluidfrom t-he body of the lamp toward or in the direction of the burnersubstantially as specified.

2. Operating the valve s, and needle point for graduating and cleaningpurposes by means of a cam groove or its equivalent in the stop cock F,in combination with the nozzle n whereby I avoid the necessity ofpacking, substantially as specified.

3. The rod a., or its equivalent when used as described by means ofwhich I am enabled to place the cam stop cock, (or its equivalent)beyond the reach of the surplus heat substantially as set forth.

4. The valve s, in combination with the rod a., spring (Z, and cam stopcock F, for the purpose of graduating the size of the flamesubstantially as specified.

H. WILLIAM DOPP.

Witnesses C. M. ALEXANDER, A. A. YEATMAN.

